<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card class="box-card">
      <div id="main"></div>
    </el-card>
  </div>
</template>

<script>
import * as echarts from "echarts";
import _ from 'lodash';
export default {
  data() {
    return {
      options: {
        title: {
          text: '用户来源'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3'
            }
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: 'value'
          }
        ]
      }
    };
  },
  //此时页面初始化完毕
  async mounted() {
    // 基于准备好的dom，初始化echarts实例
    var myChart = echarts.init(document.getElementById("main"));
    // 指定图表的配置项和数据
    const { data: res } = await this.$http.get("reports/type/1");
    if (res.meta.status !== 200) return this.$message.error("获取图表数据失败");
    // console.log(res.data);
    //数据合并
    const result =  _.merge(res.data, this.options);

    // 使用刚指定的配置项和数据显示图表。
    myChart.setOption(result);
  },
};
</script>

<style lang="stylus" scoped>
.box-card {
  margin-top: 15px;
}

#main {
  width: 750px;
  height: 400px;
}
</style>